To enable re marketing in Google Analytics, what must first be enabled?

To enable remarketing in Google Analytics, you must first activate two key features. "Advertising Reporting Features" must be enabled within your Google Analytics property settings. This allows Analytics to collect the necessary data for audience creation and remarketing. Additionally, you need to link your Google Analytics account to an advertising platform like "Google Ads or Display & Video 360." This linkage is crucial because it's where your remarketing audiences will be published and used for campaign targeting. Without both of these steps, Google Analytics cannot create or export remarketing audiences. Demographics and Interests provides audience insights but isn't a prerequisite for remarketing itself. Custom Dimensions are for collecting specific data, not for enabling remarketing.